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SL500 (R230) gearshift playing up.

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by ruffle, Nov 15, 2012.

  1. ruffle

    ruffle Member

    Messages:
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    Joined:
    Jan 2, 2012
    Location:
    Peatboghorror
    Your Mercedes:
    SL500/2003
    My 70K mile 2003 SL500 (R230) is having severe problems with gear
    selection and I'd be grateful for any pointers or suggestions.

    I first noticed this a couple of weeks back. I was in stop/start
    traffic in a city centre when pulling away from a set of traffic lights
    the car didn't shift into second gear as I expected (the lever and
    display was in 'D' and I was only gently pressing the loud pedal) until
    the revs got to over 5,500 RPM.

    I stopped, left the car for a while and when I restarted everything was
    back to normal.

    Today, driving south from Glasgow along the entire length of the M6 the
    gear selection again started playing up. It didn't change up in the
    first three gears until it was revving over 5,500 RPM and even then
    tended to stay in third gear (the display was showing 'D').

    Prodding of the gear lever to the right, sometimes persuaded
    the gearbox to select fourth but it would often jump back to third and
    refuse to shift up for a while. I couldn't get it into fifth at all
    which meant I ran most of the way at 3,000 RPM (80mph).

    Using the 'manual' gear selection from a standing start it goes as far
    as fourth (although 3rd to 4th doesn't always work and the display ends
    up showing 'D' with the car still in 3rd gear) but I still can't get
    5th.

    There's no sign of ATF leakage on the garage floor and no warning lights
    or malfunctions being shown on the display.

    Any ideas what could cause this?

    I'm sure if I take it to a Main Dealer they'll just tell me I need a new
    gearbox, which would probably be more that the car is worth, and I don't
    have a local Indy who's up to much (Cambs, Northants, Lincs border if anyone's got any suggestions).
     
  2. Mic

    Mic Senior Member

    Messages:
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    Joined:
    Nov 12, 2009
    Location:
    Oxfordshire
    Your Mercedes:
    MB SL500(2003), MB SLK320(2001), Volvo V70 XC AWD(2001)
    A good reputable Indie is worth travel and inconvenience which means that we are all within reach of a good Indie.

    Mic
     
  3. television

    television Always remembered RIP

    Messages:
    164,074
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Possible speed plate fault,,, as Mic above it needs STAR to tell you what is wrong
     
  4. OP
    ruffle

    ruffle Member

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    Joined:
    Jan 2, 2012
    Location:
    Peatboghorror
    Your Mercedes:
    SL500/2003
    Well.... yes that's true; but I'm sure you can understand that I'd rather not drive the length of the country if there's someone decent a bit closer.

    Who would you suggest for a fault like this?
     
  5. television

    television Always remembered RIP

    Messages:
    164,074
    Likes Received:
    309
    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Herts merx in Letchworth are good
     
  6. OP
    ruffle

    ruffle Member

    Messages:
    17
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    0
    Joined:
    Jan 2, 2012
    Location:
    Peatboghorror
    Your Mercedes:
    SL500/2003
    Just as a followup to this......

    Went along the Hertz Merx and what a decent bunch they are :)

    Barry sorted out my leaking 'pilot bush' (the seal on the gearbox) which had failed allowing ATF to get pumped up the cable sleeving all the way to the EGS unit in the drivers footwell.

    Apparently this had happened before as the car had a second generation seal (there have been six of seven revisions of this part!) and a replacement EGS computer.

    Anyway... serious cleaning of the loom, connectors and PCB and voila! normal gear changing is restored :)

    Nice and knowledgable people who don't charge the earth.
     

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